Improvement in flour-bolting machines



M. MARTIN. Flour-Belting Machine.

Patented July 23,1878.

I771.) e altar, 07-21% 0am: rzrzas 00.. PNOYO-LITHQ. WASNINGTON a cUNITED STATES PATENT OFFICE MORITZ MARTIN, OF BITTERFELD, PRUSSIA.

HMPROVEMENT IN FLOUR-BOLTING MACHINES.

Specification forming part of Letters Patent No. 206,186, dated July 23,1878; application Eh-d Marl-h 6 1878 patented in France, November 14,1876 in Austria, January 12, 1877.

To all whom it may concern Be it known that I, MORITZ MARTIN, ofBitterfeld, Prussia, have invented a Centrifugal FloureDressing Machine,of which the following is a specification:

This invention relates to a flour-dressing machine in which the meal issifted by being thrown against the gauze by a system of rotating bladesor heaters while the cylinder slowly revolves in the same, or, ifpreferred, in opposite direction.

On the the annexed sheet of drawings this machine is represented in twoviews, Figure 1 being a vertical longitudinal section, and Fig. 2 atransverse section. Fig. 3 shows details on a larger scale.

The cylindenframe consists of two disks, 1) and b, connected togethernear the edges by the stays a c. The disks are provided, respectively,with the hollow trunnions a and a, supported in proper bearings. Thegauze or bolting-cloth is fixed at one end to the periphery of thecircular rib d, Figs. 1 and 3, on the face of the disk b; or, ifpreferred, the said rib may be on the disk I). At the other end it isfastened to the ring 0, sliding on the circular rib d of the oppositedisk-i. a, the disk b of the drawing. This ring can be adjusted by thescrews f for stretching the gauze lengthwise.

A shaft, 1, passing tl-irough the hollow trunnions a and a, andrevolving in separate bearings, is provided inside of the cylinder withtwo or more sets of arms, carrying the blades or boaters m m, which are,by preference, made of wood. The shaft 1 is driven, by astrap andpulleys or otherwise, ata speed high enough to cause the boaters m toscatter the meal by centrifugal action. over the whole surface of thegauze, so that the flour passes through the meshes of the same, whilethe bran and the incom ple tel y-reduced particles of the grain areretained on the inside. The cylinder meanwhile also revolves, althoughbut slowly, it receivin g its motion from the shaft l by any suit ablegearing. The beatcrs m are by preference perforated for the purpose ofcausing them better to stir up the meal and to throw but smallquantities of the same against the gauze at once, whereby a speedydeterioration of the latter is prevented. The blades, when perforated,may also be driven at a higher speed, which makes the sifting processmore intense.

The meal is introduced into the cylinder through the hollow trunnion a,at the frontend, and within this trunnion it is propelled forward by aworm on the main shaft l and thrown against a small disk, at, so as tospread it out. The cylinder must be placed slightly at an incline, orthe blades or heaters an arranged somewhat obliquely-i. e., in ascrew-line of long pitch, so that the meal slowly moves toward the backend or bottom of the cylinder, or the inclination of the cylinder iscombined with the oblique position of the heaters, as may be preferred.

After the flour has been sifted 0d, the bran, &c., is taken up by radialribs 0 on the bottom disk 1/. These ribs lift the same, and thereuponlet it slide behind a conical, flaring, or otherwise suitably-shapeddisk, 12, fixed to the said ribs, or cast together with them This diskconducts the material toward the openings q, arranged around thetrunnion a, so that it is discharged into the channel r. The flour,passing through the gauze, falls into the lower part of the casing whichincloses the cylinder, and is there conveyed into one or more channels,.9, by means" of a creeper or otherwise.

If the cylinder is to be provided with two sheets of gauze, whether ofequal or of different fineness, and if the latter should thereby becometoo long to be properly stretched, a ring, k, is fixed by lugs I." tothe stays c, as shown in detail by Fig. 3-. The parts of this ring, aswell as of the ring 6, to which the gauze is to be fixed, should be ofequal diameter with the outside of the rib d. The two sheets of gauzeare fastened with one edge to the ring it, and with the otherrespectively to the rib d and to the ring 0. In a similar manner threeor more sheets may be applied.

The mode of fastening the gauze is as follows: A; cord having been sewedto the edges of the gauze, the latter is attached at two corners to therings 6 and 7c, respectively, and to the rib cl by the clamping-screwsw. Its edges are then hooked on pins 3 provided therefor. The screws 00having been slackened, the end corners of the gauze are pushed underthem and the screws tightened again. The overlapping gauze ends must beglued together. A strap, 71, of iron or other suitable material, issubsequently laid around each edge of the gauze, and drawn tightly bythe screw 2 into the shallow grooves of the ribs,respectivel v, of therings, thereby firmly uniting these parts. The gauze is finallystretched lengthwise by the adjusting-screws f until it has becomeperfectly smooth and taut.

If it be deemed advisable to place the stays inside of the gauze, theyshould be fiat or square in section, and the ring e must be slight- 1ymodified in shape. Moreover, in this case, instead of the ring or ringsk, one or more plain rings, to which the gauze should not be at taehed,are or may be permanently fixed to the stays.

' cylinder, consisting of the adjustable strap Ir,

as and for the purpose described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

M. MARTIN.

Witnesses:

ROBT. C. POPHAM, HENRY SPRINGMANN.

